(Source: Gardening Australia)
White Oil, a Horticultural Oil is used for controlling sucking and chewing insects like aphids, scale, mealy bug and citrus leaf miner. It's not a poison, but suffocates the pests - so they can't develop a resistance. It needs to be sprayed on both sides of leaves and stems to work properly.
- One cup dishwashing detergent
- Two cups sunflower oil
Add to a clearly labelled jar or other container, close the lid tightly and shake until it becomes white - and presto! Concentrated White Oil.
When ready to use, dilute one tablespoon of the concentrate to one litre of water.
Add to a clearly-labelled spray bottle, shake and off you go!
NOTE - please do not apply when the temperature is 30 degrees Celsius or over as it may burn your plants.